[gold] Adjust QPS limit for gerrit

Even logged in, I'd sometimes see rate exceeded.

Change-Id: I08c425676ca1eee6b40fbc775d6a7d10c4553693
Bug: skia:9006
Reviewed-on: https://skia-review.googlesource.com/c/buildbot/+/260640
Reviewed-by: Eric Boren <borenet@google.com>
diff --git a/golden/go/code_review/gerrit_crs/gerrit_crs.go b/golden/go/code_review/gerrit_crs/gerrit_crs.go
index 61822c2..9f1af84 100644
--- a/golden/go/code_review/gerrit_crs/gerrit_crs.go
+++ b/golden/go/code_review/gerrit_crs/gerrit_crs.go
@@ -18,7 +18,7 @@
 
 const (
 	// These values are arbitrary guesses, roughly based on the values for gitiles.
-	maxQPS   = rate.Limit(5.0)
+	maxQPS   = rate.Limit(4.0)
 	maxBurst = 20
 )